Elevator-door lock



April 27,1926. A 1,582,613

- H; T. KROG ET AL ELEVATOR DOOR LOCK Filed Oct. 3l 1925 Sheets-Sheet 1 April 27', 1926.

H. T. KROG ET AL ELEVATOR DOOR` LOCK Filed OCT.. 3l 1925 2 Sheets-Sheet 2 Patented Apr.. 2?, lg3d.

HENRY T. Inno@ or nourri-Nemen; ritme,

AND ALBERT F. HARTEL, OF LQSANGELES,

CALFORNA, ASSIGN'ORS TO A. J. Bvli- CClVIPANY, A CGBEGRATION' OE C A-L- Application filed Qctooer Californim respectively, have invented cer tain new and. usetul Improvements in, Elevator-Door Locks, ot which the following is.

a specification.

Our invention relates to Velevator door locks and more particularly 'for that class of doors known as elevator hatchways, i. e., those in which the door when closed is flush with the side walk or floor. The invention contemplates a construction which will automatically unlock the door by the lifting of the elevator or hoist and will be automatically locked when the elevator recedes so that the same is out ot contact with the doors.

leterring` to the accompanying drawings,-

Fig'. l is a perspective view of an open hatchway showing` the doors opened and having our invention applied thereto.

Fig. 2 is a detail view of the locking members, the saine being shown in a locked position.

Fig'. 3 is an enlarged view at right angles to Fig'. 2 and shows the lockingmembers and their associated parts.

Fig. 4 is a section of a hatchway with the doors locked.

Fig. 5, like Fig. 4, is a section off a hatchway showing the doors closed but with the locking` members in unlocked position.

Fin'. 6 is a section of a hatchway like Figures 4 and 5, but showing the doors being' opened by the elevator.

As shown in Fig. l, l is a hatchway frame to which are hinged the doors 2 and 2*. The elevator or hoist proper 3 has fixed to it an arched bow 4, which is the tripping,- or unlocking* member for the lock and which also acts as the door opener, as will subsequently be described. The lock consists of an L shaped keeper 5 which has therein a peritoration 6, said perforation having an outlet slot 7 which is narrower in width than the perforation 6, all of which is shown in Figs. 3 to 6 inclusive. This lockingmember 5 is fixed to the door 2a and is so positioned on the door that the bolt 8, which is fixed to ELEVATORDO@R LOCK.

si, 1925. serialA no. 66,049.

the other door 2, enters the opening 6 through, the slot t when` the doors are ina closed` position. The bolt 8 is rotatably mounted in the bracket 9 which, is carried on the door 2, which door will open first and is. therefore designated. the tast door as distinguished from the door 9x" which, will open after the fast door and will be` called the slow door. The semicircular head 110 ot the bolt 8 has a segment removed; from the end thereof, which therefore is ot such width that in one position it is no wider than the slot i' of the locking' member 5, which it must enter to lock the doors. Mounted on the bolt 8 between the cut away head of the bolts and the bracket 9, and between the bracket and the nut 13 of the bolt, are washers 14 which construction allows the bolt to be turned easily in the bracket 9, thus minimizing the friction and allowing; the bolt to be turned by the weight of the trip l1 which is attached between the projecting' end of the bracket to the bolt 8 by the set screw 15. rlhe trip has on its end a right angle eXtension l2.

lVhen the elevator is lifted, the bow 4 first comes in contact with the trip 1l, lifting the saine until the upturned end l2 of the trip comes in contact with the underside of the tast door 2. The trip by its upward movement turns the bolt 8 so that the head l0 or" the bolt is in such a position that it can pass out of the slot 7 of the other lockingl member 5 on the further rise of the elevator. See Figure 5. In this position the door 2 can be and is raised further by the bow because the trip ll is between the bow and the door and in contact with both ot them. lith a further. litt oi the elevator the slow door 2a comes iu contact with the bow and both are raised together on the continuing lift of the elevator. lVhen the elevator platform is lowered., the reverse takes place and the slow door Q is :first to come in contact with the hatchway trame and have its downward movement arrested. A further drop ot the elevator allows the fast door 2 to close and moves the bow out ot' contact with the trip ll, which drops by gravity, thus causing the bolt head l0 to be turned in the opening 6 ot the other locking' member, locking the doors in a closed position, where they can be only unlocked from the underside of the doors.

Having thus described our invention what we elaiin as new and desire to secure hy Letters Patent is l. In a hatehway the eonihination oi. a pair ot hinged doors, one having` thereon a keeper with a perforation and a slot smaller than the perforation, the other door having niounted thereon a rotary holt having one end of sueh a Width that the san'ie may enter the perforation of the keper through the slot when in one position, and a Weighted trip tending to nieve the holt frein such position.

2. in a hatehway the Combination of. hinged doors, one door having-thereon a keeper containing a restricted opening, the other door having mounted thereon a holt with a sector removed from its head and attaehed thereto a t'iip, with means in the hatehway for regulating the position of the holt head Within the keeper.

3. In a hatohway leek7 the combination with a pair of hinged doors, one having;`

thereon a keeper having a perforation opening upwardly through a restricted slot, a bolt axially pivoted on the other door and having` a portion adapted in one angular position of the holt to enter the slot but of greater length than the width ei the slot, a. gravitational ineniher influencing; the bolt and tending to maintain it in the position in whiehit will not pass through the slot, said meinberhaving an upturned portion adapted in the unloeking' position ot the bolt to contaet with the lastnained door, and means for successively lifting the gravitational ineinber into eontaet with the door and simultaneously rotating the holt to itsun.- looked position and to then raise the last named door and to thereafter lift the iirst named door.

In testimony whereof We hereunto aiiix our signatures.

HENRY T. KROG. ALBERT F. HARTEL. 

